import fetch from 'dva/fetch';
import qs from 'qs';

function parseJSON(response)
{
  return response.json();
}

function checkStatus(response)
{
  if (response.status >= 200 && response.status < 300)
  {
    return response;
  }
  const error = new Error(response.statusText);
  error.response = response;
  throw error;
}

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [options] The options we want to pass to "fetch"
 * @return {object}           An object containing either "data" or "err"
 */
export default function request(url, options)
{
  Pace.restart();
  if(!options)
  {
    options = {};
  }
  //options.credentials = 'include';
  return fetch(url, options)
    .then(checkStatus)
    .then(parseJSON)
    .then((data) =>
    {
       console.log(data);
       Pace.stop();
       return {data};
     })
    .catch((err) => ({ err }));
}
export function object_to_formData(obj)
{
  let form = new FormData();
  for(let key in obj)
  {
    form.append(key,obj[key]);
  }
  return form;
}
export function http_post(url,params)
{
  let body = object_to_formData(params);
  return request(url, {
    method: 'post',
    body
  });
}
export function http_get(url,params)
{
  return request(`${url}?${qs.stringify(params)}`);
}